'\" te
.\" Copyright (c) 2004, Sun Microsystems, Inc. All Rights Reserved
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.TH DDI_CREATE_MINOR_NODE 9F "May 01, 2020"
.SH NAME
ddi_create_minor_node \- Create a minor node for this device
.SH SYNOPSIS
.nf
#include <sys/stat.h>
#include <sys/sunddi.h>



\fBint\fR \fBddi_create_minor_node\fR(\fBdev_info_t *\fR\fIdip\fR, \fBconst char *\fR\fIname\fR,
     \fBint\fR \fIspec_type\fR, \fBminor_t\fR \fIminor_num\fR, \fBconst char *\fR\fInode_type\fR,
     \fBint\fR \fIflag\fR);
.fi

.SH INTERFACE LEVEL
illumos DDI specific (illumos DDI).
.SH PARAMETERS
.ne 2
.na
\fB\fIdip\fR \fR
.ad
.RS 14n
A pointer to the device's \fBdev_info\fR structure.
.RE

.sp
.ne 2
.na
\fB\fIname\fR \fR
.ad
.RS 14n
The name of this particular minor device.
.RE

.sp
.ne 2
.na
\fB\fIspec_type\fR \fR
.ad
.RS 14n
\fBS_IFCHR\fR or \fBS_IFBLK\fR for character or block minor devices
respectively.
.RE

.sp
.ne 2
.na
\fB\fIminor_num\fR \fR
.ad
.RS 14n
The minor number for this particular minor device.
.RE

.sp
.ne 2
.na
\fB\fInode_type\fR \fR
.ad
.RS 14n
Any string literal that uniquely identifies the type of  node. The following
predefined node types are provided with this release:
.sp
.ne 2
.na
\fB\fBDDI_NT_SERIAL\fR \fR
.ad
.RS 24n
For serial ports
.RE

.sp
.ne 2
.na
\fB\fBDDI_NT_SERIAL_MB\fR \fR
.ad
.RS 24n
For on board serial ports
.RE

.sp
.ne 2
.na
\fB\fBDDI_NT_SERIAL_DO\fR \fR
.ad
.RS 24n
For dial out ports
.RE

.sp
.ne 2
.na
\fB\fBDDI_NT_SERIAL_MB_DO\fR \fR
.ad
.RS 24n
For on board dial out ports
.RE

.sp
.ne 2
.na
\fB\fBDDI_NT_BLOCK\fR \fR
.ad
.RS 24n
For hard disks
.RE

.sp
.ne 2
.na
\fB\fBDDI_NT_BLOCK_CHAN\fR \fR
.ad
.RS 24n
For hard disks with channel or target numbers
.RE

.sp
.ne 2
.na
\fB\fBDDI_NT_CD\fR \fR
.ad
.RS 24n
For CDROM drives
.RE

.sp
.ne 2
.na
\fB\fBDDI_NT_CD_CHAN\fR \fR
.ad
.RS 24n
For CDROM drives with channel or target numbers
.RE

.sp
.ne 2
.na
\fB\fBDDI_NT_FD\fR \fR
.ad
.RS 24n
For floppy disks
.RE

.sp
.ne 2
.na
\fB\fBDDI_NT_TAPE\fR \fR
.ad
.RS 24n
For tape drives
.RE

.sp
.ne 2
.na
\fB\fBDDI_NT_NET\fR \fR
.ad
.RS 24n
For DLPI style 1 or style 2 network devices
.RE

.sp
.ne 2
.na
\fB\fBDDI_NT_DISPLAY\fR \fR
.ad
.RS 24n
For display devices
.RE

.sp
.ne 2
.na
\fB\fBDDI_PSEUDO\fR \fR
.ad
.RS 24n
For pseudo devices
.RE

.RE

.sp
.ne 2
.na
\fB\fIflag\fR \fR
.ad
.RS 14n
If the device is a clone device then this flag is set to \fBCLONE_DEV\fR else
it is set to \fB0\fR.
.RE

.SH DESCRIPTION
\fBddi_create_minor_node()\fR provides the necessary information to enable the
system to create the \fB/dev\fR and \fB/devices\fR hierarchies. The \fIname\fR
is used to create the minor name of the block or character special file under
the \fB/devices\fR hierarchy. At-sign (\fB@\fR), slash (\fB/\fR), and space are
not allowed. The \fIspec_type\fR specifies whether this is a block or character
device. The \fIminor_num\fR is the minor number for the device. The
\fInode_type\fR is used to create the names in the \fB/dev\fR hierarchy that
refers to the names in the \fB/devices\fR hierarchy. See \fBdisks\fR(8),
\fBports\fR(8), \fBtapes\fR(8), \fBdevlinks\fR(8). Finally \fIflag\fR
determines if this is a clone device or not, and what device class the node
belongs to.
.SH RETURN VALUES
\fBddi_create_minor_node()\fR returns:
.sp
.ne 2
.na
\fB\fBDDI_SUCCESS\fR \fR
.ad
.RS 16n
Was able to allocate memory, create the minor data structure, and place it into
the linked list of minor devices for this driver.
.RE

.sp
.ne 2
.na
\fB\fBDDI_FAILURE\fR \fR
.ad
.RS 16n
Minor node creation failed.
.RE

.SH CONTEXT
The \fBddi_create_minor_node()\fR function can be called from user context. It
is typically called from \fBattach\fR(9E) or \fBioctl\fR(9E).
.SH EXAMPLES
\fBExample 1 \fRCreate Data Structure Describing Minor Device with Minor Number
of 0
.sp
.LP
The following example creates a data structure describing a minor device called
\fIfoo\fR which has a minor number of 0. It is of type \fBDDI_NT_BLOCK\fR (a
block device) and it is not a clone device.

.sp
.in +2
.nf
ddi_create_minor_node(dip, "foo", S_IFBLK, 0, DDI_NT_BLOCK, 0);
.fi
.in -2

.SH SEE ALSO
.BR add_drv (8),
.BR devlinks (8),
.BR disks (8),
.BR drvconfig (8),
.BR ports (8),
.BR tapes (8),
.BR attach (9E),
.BR ddi_remove_minor_node (9F)
.sp
.LP
\fIWriting Device Drivers\fR
.SH NOTES
If the driver is for a network device (\fInode_type\fR \fBDDI_NT_NET\fR), note
that the driver name will undergo the driver name constraints identified in the
NOTES section of \fBdlpi\fR(4P). Additionally, the minor name must match the
driver name for a DLPI style 2 provider. If the driver is a DLPI style 1
provider, the minor name must also match the driver name with the exception
that the ppa is appended to the minor name.
.sp
.LP
Non-\fBgld\fR(4D)-based DLPI network streams drivers are encouraged to switch
to \fBgld\fR(4D). Failing this, a driver that creates DLPI style-2   minor
nodes must specify CLONE_DEV for its style-2 \fBddi_create_minor_node()\fR
nodes and use \fBqassociate\fR(9F). A driver that supports both style-1 and
style-2 minor nodes should return DDI_FAILURE for DDI_INFO_DEVT2INSTANCE and
DDI_INFO_DEVT2DEVINFO \fBgetinfo\fR(9E) calls to style-2 minor nodes. (The
correct association is already established by \fBqassociate\fR(9F)). A driver
that only supports style-2 minor nodes can use \fBddi_no_info\fR(9F) for its
\fBgetinfo\fR(9E) implementation. For drivers that do not follow these rules,
the results of a \fBmodunload\fR(8) of the driver or a \fBcfgadm\fR(8) remove
of hardware controlled by the driver are undefined.
.SH WARNING
Drivers must remove references to GLOBAL_DEV, NODEBOUND_DEV, NODESPECIFIC_DEV,
and ENUMERATED_DEV to compile.
